Registration Dossier
Registration Dossier
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EC number: 244-491-1 | CAS number: 21643-42-5
Endpoint summary
Administrative data
Description of key information
Additional information
Biodegradation
Biodegradation in water: screening test
The biodegradability of the read across substance (mixture of CAS no. 2156-97-0 and 21643-42-5) was assessed according to OECD guideline 301B (1992) and EU-method C.4-C (2008). The degree of biodegradation of the test substance was 80-90 %CO2/ThCO2 after an exposure period of 28 days. The read across substance (mixture of CAS no. 2156-97-0 and 21643-42 -5) is readily biodegradable under the conditions of this test.
Biodegradation in water and sediment and soil.
In accordance with column 2 of REACH Regulation (EC) No 1907/2006, Annex XI, section 9.2.1.2, 9.2.1.3 and section 9.2.1.4 no study on biodegradation in water, sediment and soil needs to be conducted if the test substance is biodegradable under test conditions. The long-chain alkylsters (C12 - C14) are all readily biodegradable under test conditions. Thus no futher biodegradation testing in water and sediment and soil is required.
Bioaccumulation
The bioaccumulation potential of the test substance was calculated to be138.3 L/kg wet-wt or log BCF = 2.141 using the EPA Epiwin (v.4.11) software. Furthermore, direct and indirect exposure of the test item to water and soil is highly unlikely.
Adsorption/Desorption
The adsorption coefficient of the test substance was estimated using KOCWIN v2.00 embedded in EPI Suite v4.11 of EPA’s Office of Pollution Prevention Toxics and Syracuse Research Corporation (SRC). The program is a screening level tool and estimates the log Koc adsorption coefficient using a Molecular Connectivity Index (MCI). Tetradecyl acrylate has a molecular weight of 268.4 g/mol and therefore fits the applicability domain of this model. A log Koc of 4.1551 was derived for the test item.
The Henry`s Law constant is calculated to be 373 Pa/m³/mole based on the Bond method. Substancex with Henry´s Law constant of > 100 Pa m³/mole will evaporate into the atmosphere from the water surface.
Hydrolysis
In accordance with column 2 of REACH Regulation (EC) No 1907/2006, section 9.2.2.1, a study on hydrolysis does not need to be conducted as all long-chain alkyl esters (C12 - C14) are readily biodegradable. Further the water solubility of read across substance (mixture of CAS no. 2156-97-0 and 21643-42 -5) is very low (< 0.2 mg/L at 20 °C)
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